my dad want's me to come to china what do i do?? do ineed to submit any documents??

Since your dad is a Chinese citizen, you can apply for the Q type to come to PRC. There are two kinds: Q1 (longer than 180 days) and Q2 (less than 180 days). Your dad should send you an invitation letter, a copy of his Chinese ID card and kinship certificate (your birth certificate for example). And you should prepare for your passport, a finished 2013 application form affixed with a recent passport size photo.